MESON Chess Problem Database

Problem Display
PID: 51646 (8/8/8/3B4/4pP2/2pk4/4N3/R3K2R w QK - 0 1)

Pitkanen, Jorma

1st HM., The Problemist, 2003/II

8/8/8/3B4/4pP2/2pk4/4N3/R3K2R

#2

6 + 3

56 The Problemist 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Rh3#
    • 1...c2
      • 2.Ra3#
  • Tries
    • 1.Rb1?
      • 1...Kc2
        • 2.Bxe4#
      • 1...Ke3
        • 2.Rh3#
      • 1...c2
        • 2.Rb3#
      • 1...e3!
    • 1.Rc1?
      • threat
        • 2.Rxc3#
      • 1...Ke3
        • 2.Rxc3#
        • 2.Rh3#
      • 1...c2!
    • 1.Rd1+?
      • 1...Ke3
        • 2.Rh3#
      • 1...Kc2!
    • 1.Ra2?
      • 1...Ke3
        • 2.Rh3#
      • 1...c2
        • 2.Ra3#
      • 1...e3!
    • 1.Ra3?
      • threat
        • 2.Rxc3#
      • 1...Ke3
        • 2.Rh3#
        • 2.Rxc3#
      • 1...Kc2!
    • 1.Ra4?
      • 1...Ke3
        • 2.Rh3#
      • 1...e3
        • 2.Be4#
      • 1...c2
        • 2.Ra3#
      • 1...Kc2!
  • Keys
    • 1.Rh2!
      • 1...Kc2
        • 2.Sc1#
      • 1...Ke3
        • 2.Rh3#
      • 1...e3
        • 2.0-0-0#
      • 1...c2
        • 2.Ra3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::R(C)
    • P(a);OGATEB,SBLOCK::R(A)
  • Tries
    • Try
      • R(A);
      • Vars
        • K(b);S_FLIGHT::B(F),XP(c)
        • K(b);P-FLIGHT::R(C)
        • P(a);OGATEB,SBLOCK::R(A)
      • Refutation
        • P(c);
    • Try
      • R(A);
      • Threat
        • R1(A),XP(a)
      • Refutation
        • P(a);
    • Try
      • R(A);CHECK
      • Vars
        • K(b);P-FLIGHT::R(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(b);P-FLIGHT::R(C)
        • P(a);OGATEB,SBLOCK::R(A)
      • Refutation
        • P(c);
    • Try
      • R(A);P_PINP(a)
      • Threat
        • R1(A),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(b);P-FLIGHT::R(C)
        • P(c);SBLOCK::B(F)
        • P(a);OGATEB,SBLOCK::R(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(C);
    • Vars
      • K(b);S_FLIGHT::R(C)+S(D)
      • K(b);P-FLIGHT::R(C)
      • P(c);SBLOCK::0-0-0
      • P(a);OGATEB,SBLOCK::R(A)
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